Ep. 17: Transformasi Ajaib Putri Duyung! Cure La Mer!

Picking up from the last episode, while Cure Summer and the other Cures search for Laura, the Witch warns Laura to not interfere with her efforts before sending her generals to steal more motivation. As such, Summer and her comrades are forced to surface to engage two Zenzen Yaraneedas summoned by Chongire and Numeri. Meanwhile, Laura locates Kururun and tasks her to steal the basement key as part of her escape, but gets caught by the Witch and Butler as she tries to claim back her Mermaid Aqua Pot. While Laura evades the Witch, she gets bested by Butler, forcing Kururun to save her. The Mermaid Queen congratulates Laura for finding the Pretty Cure, but Laura wants to help her friends who are currently struggling to defeat their enemies and is given a rocky object to aid her in that new desire. Laura hurries back to Manatsu and her friends to protect them, with her getting her Heart Kuru Ring and the stone from the object cracking, revealing to be her Mermaid Aqua Pact, which allows Laura to transform into Cure La Mer. With this new power, La Mer revives her comrades, salvages the monsters' stolen motivation and leads the others in finishing off the enemies. Afterwards, Laura joyfully discovers she has become a human and moves into Manatsu's. (Source: Wikipedia)
Episode
- Ep. 13 · Isu Putri Duyung Memicu Kekacauan Siaran Sekolah dan Serangan Monster
- Ep. 14 · Pengalaman Mengajar Prasekolah Tropical Club dan Anak-Anak Pecinta Serangga Bertemu Monster
- Ep. 15 · Minori dan Laura Bertukar Tubuh Setelah Insiden Toples yang Tidak Disengaja
- Ep. 16 · Perangkap Penyihir! Laura Ditangkap!
- Ep. 17 · Transformasi Ajaib Putri Duyung! Cure La Mer!
- Ep. 18 · Laura memulai sekolah di Aozora Middle School dan bergabung dengan Klub Renang sebelum bertarung melawan monster.
- Ep. 19 · Manatsu Panik Atas Tujuh Legenda Sekolah dan Misteri Rumah Kosong
- Ep. 20 · Rencana Perkemahan Tropical Club dan Misteri Roti Melon yang Hilang
- Ep. 21 · Rencana Kemah Klub Tropis: Petualangan Liburan Musim Panas